A sample of 121 sanitation workers for the city of Woodbay earns an average of $24,375 per
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A sample of 121 sanitation workers for the city of Woodbay earns an average of $24,375 per year. The average salary for all Woodbay city workers is $24,230, with a standard deviation of $523. Is the mean income of sanitation workers significantly different from the mean income of all city workers? Please use the five steps of hypothesis testing and conduct a z test at the 0.05 significance level.
Related Book For
An Introduction to Statistical Methods and Data Analysis
ISBN: 978-1305269477
7th edition
Authors: R. Lyman Ott, Micheal T. Longnecker
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